IC-HT datasheet(19/42 Pages) ICHAUS

19 / 42 page

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iC-HT

DUAL CW LASER DIODE DRIVER

Rev A1, Page 19/42

STATUS0 (Addr. 0x00)

PDOVDD

MEMERR

(Addr. 0x10 )

OVC2

CFGTIMO

(Addr. 0x15 )

INITRAM

OVT

OVC1

ENCH2

DISC2

INSOPEN

EMCOPEN

EC2

ENCH1

DISC1

EC1

Figure 7: Laser control logic in MCU mode

COMBINING BOTH CHANNELS

iC-HT can drive one laser diode up to 1500 mA with

both channels combined.

Therefore register bit MERGE must be set to 1. Dis-

able channel register bits DISC1 and DISC2 must both

be set to 0 and both enable channel pins EC1 and EC2

must be set hi.

MERGE

Addr. 0x1B; bit 6

R/W 0

Channel 1 and 2 operate independently

Power transistor from channel 2 in parallel with

channel 1, controlled by channel 1

Table 42: Channel merging

When both channels are combined the control is done

by channel 1. APC and ACC can both be used with

both channels combined. In ACC mode, the reference

needs be set to 50% of the desired current value. This

is not required for APC.

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